Samsung ML-2500, ML-2510, ML-2570, ML-2571N Service Manual

LASER PRINTER

ML-2500 Series

ML-2510/XAA

Basic Model : ML-2571N

SERVICE Manual

LASER PRINTER	The keynote of Product
	- Speed : 25ppm (Ltr) / 24ppm(A4), 600dpi
	- Paper Path : MPF Type Cassette
	- Emulation : SPL (ML-2510)
	PCL (ML-2570/ML-2571N)
	- Processor : 150MHz Jupiter4e CPU
	400MHz SPGP V3 CPU
	- Memory : ML-2510(SDRAM, 8MB),
	ML-2570/2571N(SDRAM, 32MB)
	- MP Cassette : 250 pages / Face Down
	(100 pages)
	- Fuser Design : Lamp Type
	- I/O : ML-2510(USB1.1+IEEE 1284),
	ML-2570/2571N(USB2.0+IEEE 1284)
ML-2571N	- Machine Life : 50K(pages)

Contents

1.Precautions

1.1Safety Warning 1-1

1.2Safety Caution 1-2

1.3ESD Precautions1-4

2.Product Specification

2.1Product Overview 2-1

2.2Specifications 2-1

2.3Model Comparison Table 2-5

2.4ACCESSORY 2-5

3.System Overview

3.1System Outline 3-1

3.2H/W Structure and Descriptions3-7

3.3S/W Structure and Descriptions 3-23

3.4Initial Product Installation 3-27

4.Alignment and Adjustments

4.1Sample Pattern 4-1

4.2Control Panel 4-2

4.3Consumables and Replacement Parts 4-4

4.4Periodic Defective Image 4-5

4.5How to use DCU 4-6

4.6Paper Path 4-11

Continued

5.Disassembly and Reassembly

5.1General Precautions on Disassembly 5-1

5.2Disassembly and Reassembly 5-2

6.Troubleshooting

6.1Checking Symptoms 6-1

6.2Bad discharge 6-4

6.3Malfunction 6-8

6.4Bad software environment 6-13

6.5Bad Image 6-17

7.Exploded Views & Parts List

7.1Exploded Views and Parts List 7-1

8.Block diagram

8.1 ML-2510 H/W Block Diagram

8-1

8.2ML-2570/2571N H/W Block Diagram 8-2

9.Connection Diagram

9.1ML-2510 Connection Diagram 9-1

9.2ML-2570/2571N Connection Diagram 9-2

10.Schematic Diagram

10.1PCL_Main Board 10-1

10.2GDI_Main Board 10-6

10.3Connector Circuit Diagram 10-17

10.4SMPS Circuit Diagram 10-18

10.5HVPS Circuit Diagram(1/3) 10-19

Continued

11.Reference Information

11.1Troubleshooting Tools 11-1

11.2Acronyms and Abbreviations 11-2

11.3Selecting printer locations 11-4

11.4Sample Tests Patterns 11-5

12.Circuit Description

12.1Engine Controller 12-1

1	Precautions

1. Precautions

The cautions below are items needed to keep in mind when maintaining and servicing.

Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent the machine from getting damaged.

1.1 Safety Warning

(1) Request service by qualified service person.

Service for this machine must be performed by a Qualified service person. It is dangerous if unqualified service personnel or users try to fix the machine.

(2) Do not rebuild.

Do not attach or change parts discretionary. Do not dissemble, fix of rebuilt it. If so, printer will abnormally work and electric shock or fire may occur.

(3) Laser Safety Statement

The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for Class 1(1) laser products, and elsewhere, is certified as a Class I laser product conforming to the requirements of IEC 825.

Class I laser products are not considered to be hazardous. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition.

Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The reflected beam, although invisible, can damage your eyes. When using this product, these basic safety precautions should always be followed to reduce risk of fire, electric shock, and injury to persons.

Samsung Electronics	Service Manual	1-1

Precautions

1.2 Safety Caution

1.2.1 Noxious Material Precaution

The toner in a printer cartridge contains a chemical material, which may harm human body if it is swallowed. Please keep children out of reach of the toner cartridge.

1.2.2 Electric Shock or fire Precaution

It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.

(1)Use exact voltage. Please use an exact voltage and wall socket. If not, a fire or an electric leakage can be caused.

(2)Use authorized power cord. Do use the power cord supplied with PRINTER. A fire can happen when over current flows in the power cord.

(3)Do not insert many cords in an outlet. A fire can be occurred due to flow over current in an outlet.

(4)Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc. It can cause a fire, electric shock, or malfunction. If this occurs, turn off the power and remove the power plug from outlet immediately.

(5)Do not touch the power plug with wet hand. When servicing, remove the power plug from outlet. Do not insert or take off it with wet hand. Electric shock can be occurr.

(6)Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not, a fire can be caused due to poor contact. When taking off the power plug, grip the plug and take it off. If grip the line and pull over, it could be damaged. A fire or electric shock could happen.

(7)Management of power cord. Do not bend, twist, or bind it and place other materials on it. Do not fix with staples. If the power cord gets damaged, a fire or electric shock can happen. A damaged power cord must be replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plastic tape can be cause a fire or electric shock. Do not spread chemicals on the power cord. Do not spread insecticide on the power cord. A fire or electric shock can be happen due to thinner(weak) cover of the power cord.

(8)Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or not. When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when moving the machine.

(9)Caution when there is thundering or lightning, and being flash of lightening. It causes a fire or electric shock. Take the power plug off there is thunder. Do not touch cable and device when thundering and flash of lightening.

(10)Avoid the place where is moisture or has dust. Do not install the printer where lots of dust or around humidifier. A fire can occurred. A plug part need to clean well with dried fabric to remove dust. If water drops are dripped on the place covered with dust, a fire can occurred.

(11)Avoid direct sunlight. Do not install the printer near window where direct contacts to the sunlight. If the machine contacts sunlight long time, the machine cannot work properly because inner temperature of the machine is getting hotter. A fire can occur.

(12)Turn off the power and take off the plug when smoke, strange smell, or sound from the machine. If you keep using it, a fire can be occurred.

(13)Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventilator. An electric shock could happened.

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Precautions

1.2.3 Handling Precautions

If you ignore this information, you could harm machine and could be damaged.

(1)Do not install it on different levels, or slanted floor.

Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be happened due to the machine falling over.

(2)Be careful not to insert a finger or hair in the rotating unit.

Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the machine is operating. Once it happens, you could be harmed.

(3)Do not place a pot containing water/chemical or small metals. If they got caught into the inner side of machine, a fire or electric shock can be occurred.

(4)Do not install it where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock can be caused.

(5)Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A fire can be occurred.

1.2.4 Assembly/Disassembly precaution

When replacing parts, do it very carefully. Memorize the location of each cable before replace parts for reconnecting it afterwards. Memorize. Please perform the steps below before replace or disassembly the parts.

(1)Check the contents stored in the memory. All the information will be erased after replacing main board. The information needed to keep has to be written down.

(2)Before servicing or replacing electric parts, take off plug.

(3)Take off printer cables and power cord connected to printer.

(4)Use formal parts and same standardized goods when replacing parts.Must check the product name, part cord, rated voltage, rated current, operating temperature, etc.

(5)Do not over-force when release or tighten up the plastic parts.

(6)Be careful not to drop small parts such as screws in the printer.

(7)Be careful not to change the location of small parts such as screws when assembling and disassembling.

(8)Remove dust or foreign matters completely to prevent fire of tracking, short, or etc.

(9)After finished repair, check the assembling state whether it is same as before the repair or not.

Samsung Electronics	Service Manual	1-3

Precautions

1.3 ESD Precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components.

The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.

Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

1.Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the unit under test.

2.After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly.

3.Use only a grounded tip soldering iron to solder or desolder ESDs.

4.Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

5.Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.

6.Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7.Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the protective material to the chassis or circuit assembly into which the device will be installed.

8.Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9.Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.

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				Product Specifications
	2. Product Specifications
	2.1 Product Overview
		Item	Descriptions		Remark
2
		Basic Model	ML-2571N
		Series Model	ML-2510, ML-2570
		Market of Sailes	Persnal user Laser printer.(Low Price for small work Group.)
		Specification	24ppm(Ltr. 25ppm), Jupiter 4e 150MHz, 8Mbytes SDRAM,
			SPGP V3 400MHz, 32Mbytes SDRAM
			1K(initial), 3K(sailes)
			USB 1.1 (Compatible with USB 2.0) + IEEE 1284 Parallel : ML-2510
			USB 2.0 + IEEE 1284 Parallel : ML-2570, ML-2571N
			250pages feeding, 100pages Face Down

2.2 Specifications

Product Specifications are subject to change without notice. See below for product specifications.

2.2.1 General Specifications

Item	Descriptions
Print Method	Electro-photographic Printing
Developing system	Non-Magnetic, Mono-Component Developing System
Print Speed	24 PPM : A4 size
	25 PPM (Letter size)
Resolution	True 1200 X 600 DPI, 1200 X 1200(ML-2570/2571N)
Source of Light	Laser diode (LSU : Laser Scanning Unit)
Warm-Up Time	Cold Warm-up : 15sec, Sleep mode : 15sec
First Print Time	Less than 9 seconds (Ready to 1st page out)
Feed Method	Cassette & Manual
Media Size	76 X 128mm (3 x 5”) to 216 X 356mm (8.5 X 14”)
Paper thickness	Cassette : 16 ~28 lb , Manual Feeder : 16 ~ 43 lb
Size(W X D X H)	352 X 298 X 243 mm
Weight	Net : 5.6Kg with out toner cartridge(W/O)
	Gross : 8.7Kg(41Ib)
Acoustic Noise	Stand by : Less than 35 dB
	Printing : Less than 53 dB
Power save mode	Yes
Toner save mode	Yes
Machine Life	50,000pages

Samsung Electronics	Service Manual	2-1

Product Specifications

Item			Descriptions
Periodic Replacing Parts	Pick Up Roller : 50,000 Pages
Same with Machine Life	Transfer Roller : 50,000 Pages
	Fuser Assembly : 50,000 Pages
	Toner Sensor		No
	Toner Type		Non-Magnetic Contact System
	Toner Initial		1,000 sheets@ISO 19752 Standard coverage
	Toner sale		3,000 sheets@ISO 19752 Standard coverage
Cassette	- Paper capacity : 250sheets
	- Paper weight : 60 ~ 163 g/	/ 16 ~ 43 lbs

2.2.2 Controller

Item	Descriptions
Processor(CPU)	Jupiter 4e 150MHz/SPGP V3 400MHz
Memory	Standard/Max. : 8MB(Max. 8MB) - ML-2510/32MB(Max. 32MB) - ML-2570/2571N
	Type : SDRAM
	Expand Memory Slot, Type : NO
	Compression Technology : MET(Memory Enhancement Technology)
(Emulation)	Standard : SPL/PCL
	Auto Emulation Sensing : YES
(Interface)	USB 1.1 (Compatible with USB 2.0)+IEEE 1284 for ML-2510,
	USB 2.0+IEEE 1284 for ML-2570/2571N
	Option : NO
	Auto Interface Sensing : YES
Font	Type : Windows Fonts
	Number : NO
Test Print	Demo Mode : Press the Demo Key for 2 Seconds
	Configration Mode : Press the Demo Key for 4 Seconds
	Cleaning Mode : Not Support
	Service Mode : Press the Demo Key when Power on(F/W Download)

ML-2510 model : I/O Support(USB 1.1 + IEEE 1284 Parallel port)

ML-2570/2571N model : I/O Support(USB 2.0 + IEEE 1284 Parallel port)

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Samsung Electronics

Product Specifications

2.2.3 Electrical Specification

Item		Descriptions		Remark
Input Voltage	Nominal input voltage		220~240 VAC
	Input voltage range		198~255 VAC
	Nominal frequency		50/60 MHz
	Frequency tolerance		+3Hz
Power Consumption	Printing : 390W Ave(Max. 400W) - 2510 Model
	400W Ave(Max. 420W) - 2570/2571N Model
	Idling : 65W Ave or less-ML-2510 Model
	70W Ave or less-ML-2570/2571N Model
	Power Save : 6.5W Ave or less-ML-2510 Model
	8.5W Ave or less-ML-2570/2571N Model

2.2.4 Environmental Range

Item	Operating	Storage
Temperature	10~30 oC(50-90 oF)	-20~40 oC (-4~104 oF)
Humidity	20~80%RH	10~80%RH

2.2.5 Toner Cartridge

Item	Descriptions	Remark
Life span	Starter: 1,000 Pages(initial)	A4 Size, ISO 19752 Pattern
	Running : 3,000 Pages(sailes)	Standard Coverage SIMPLEX
Developing Method	Non-magnetic Contact Developing
Charging Method	Conductive Roller Charging
Toner Empty sensor	No
Ozone	0.1PPM or less
Cartridge Style	Single cartridge

Samsung Electronics	Service Manual	2-3

Product Specifications

2.2.6 Paper Handling Specifications

Please refer to Paper Secifications on user Guide.

2.2.6.1 Input Paper Size

Paper	paper size		Cassette
A4	210 X 297 mm		O
Letter	216 X 279(8.5 X 11")		O
US Folio(Legal13")	216 X 330(8.5 X 13")		O
Legal(Legal14")	216 X 356(8.5 X14")		O
Executive	184 X 267((7.25 X10.5")		O
Statement	140 X 216(5.5 x8.5")		O
ISO B5	176 X 250		O
JIS B5	182 X257		O
A5	148 X 210		O
A6	105 X148	O(	)
No.10 Env.	105 X 241(4.15 X 9.5")	O(	)
Monarch Env.	98 X191(3.87 X 7.5")	O(	)
DL Env.	110 X 220(4.33 X 8.66")	O(	)
C5 Env.	162 X 229(6.38 X 9.01")	O(	)
C6 Env.	114 X 162(4.49 X 6.38")	O(	)
Transparency(OHP)	A4 or Letter	O(	)
Label paper	A4 or Letter	O(	)

2.2.6.2 Input capacity

Item	Descriptions
Cassette	250 sheets

2.2.6.3 Output capacity

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Product Specifications

2.3 Model Comparison Table

	Model Name	ML-2510		ML-2570		ML-2571N
	Company	Samsung		Samsung		Samsung
	Printing Process
	Print Method:	Electrophotographic Laser		Electrophotographic Laser		Electrophotographic laser
	Print Speed	Up to 24ppm in A4, Up to 25ppm in letter		Up to 24ppm in A4, Up to 25ppm in letter		Up to 24ppm(A4)
	FPOT		9sec		9sec		9sec
	Resolusion	1200x600		1200x1200		1200x1200
	Duty Cycle, Monthly	up to 5000 prints per month		up to 5000 prints per month		up to 15,000 prints per month
	Hardware Software
	Processor Type	Samsung Jupiter 4e 150MHz		Samsung SPGP V3 400MHz		Samsung SPGP V3 400MHz
	Memory	8MB(8MB)		32MB SDRAM(32MB)		32MB SDRAM(32MB)
	OS	Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6		Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6		Win9X/ME/2000/XP/Linux7/NT4.0/Mac OS8.6
	Standard Emulations		SPL		PCL		PCL
	Interface Support
	Standard Interfaces	USB 1.1(Compatible with USB 2.0)+		USB 2.0		USB 2.0
		IEEE 1284 Parallel		IEEE 1284 Parallel		IEEE 1284 Parallel
		Cable Not Supply(KOR,CHINA is Supply)
	Optional Interfaces		N/A		N/A		N/A
	Paper Handling
	Standard Paper Input	250 Sheets Multi-purpose Tray		250 Sheets Multi-purpose Tray		250 Sheets Multi-purpose Tray
	Paper Output	Face down : 100 Sheet(TBD)		Face down : 100 Sheet(TBD)		100 Sheet Face Down Tray
	Duplexing		Manual		Manual		Manual
	Paper Weight :
	- Plain paper	16 to 24 lb. Bond(60 to 90g/m2)		16 to 24 lb. Bond(60 to 90g/m2)		16 to 24 lb. Bond(60 to 90g/m2)
	- Thick stock	24 - 90 lb. Index(163g/m2)		24 - 90 lb. Index(163g/m2)		24 - 90 lb. Index(163g/m2)
	Physical
	Type	Laser Printer with Internal Controller		Laser Printer with Internal Controller		Laser Printer with Internal Controller
	Dimensions w/output	352mm x 298mm x 243mm		352mm x 298mm x 243mm		352mm x 298mm x 243mm
	tray extended(WxDxH)
	Weight(without cartridge)		5.6kg		5.6kg		5.6kg
	Carton Dimensions	455mm x 415mm x 325mm		455mm x 415mm x 325mm		508mm x 425mm x 265mm
	(WxDxH)
	Weight(as shipped)		8.7kg		8.7kg		8.7kg
	Electical
	Power Requirements
	Power Consumption	Power Consumption		Power Consumption		Power Consumption
		390W printing, 6.5W Down Sleep Mode		400W printing, 8.5W Down Sleep Mode		400W printing, 8.5W Down Sleep Mode
	Energy Star* Compliant		Yes		Yes		Yes
	Environmental
	Temprature :
	- Operating	10	to 32	10	to 32	10	to 32
	- Non-Operating	0	to 40	0	to 40	0	to 40
	Humidity :
	- Operating	: 20% to 80% RH		: 20% to 80% RH		: 20% to 80% RH
	- Non-Operating	: 20% to 80% RH		: 20% to 80% RH		: 20% to 80% RH
	Noise Level :
	Operating	Operating : <53dB(A), Standby : <35dB(A)		Operating : <53dB(A), Standby : <35dB(A)		Operating : <53dB(A), Standby : <35dB(A)
	Consumables
	Starter	up to 1,000 pages(A4/Letter) at ISO 5% coverage		up to 1,000 pages(A4/Letter) at ISO 5% coverage		up to 1,000 pages(A4/Letter) at ISO 5% coverage
		continuous printing.		continuous printing.		continuous printing.
	Replacement	up to 3,000 pages(A4/Letter) at ISO 5% coverage		up to 3,000 pages(A4/Letter) at ISO 5% coverage		up to 3,000 pages(A4/Letter) at ISO 5% coverage

Samsung Electronics	Service Manual	2-5

Product Specifications

*. These model are as yet undeveloped.

Acessory	Code	Quantity
INA-ACCESSORY	JC99-01993J	-
S/W APPLICATION-CD	JC46-00287A	1
COVER-M_PAPER (PAPER COVER)	JC63-01119A	1
MANUAL-(CARD)WARRANTY CARD	JC68-00690A	1

Acessory	Code	Quantity
INA-ACCESSORY	JC99-01986C	-
S/W APPLICATION-CD	JC46-00291A	1
COVER-M_PAPER (PAPER COVER)	JC63-01119A	1
MANUAL-(CARD)WARRANTY CARD	JC68-00690A	1

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System Overview

33. System Overview

3.1 System Outline

Paper Path Layout

14

12

13

BIN PATH

12 MAIN PBA

13 SMPS

14 HVPS

Samsung Electronics	Service Manual	3-1

System Overview

Unit Layout

LSU

Panel

HVPS

Motor

SMPS

Main PBA

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Samsung Electronics

System Overview

3.1.1 Feeding

There are the C-path type, which loads papers, and the manual feeder, which supplies paper one by one.The cassette has the function pad which separates paper one by one, and it has the sensor function to check the existence of the loading paper.

1)Feeding Type : MPF Type

2)Feeding Standard : Center Loading

3)Feeding Qty : Cassette 250 sheets (75g/, 20lb paper standard)

4)Manual 1 sheet (Paper, OHP, Envelope etc.)

5)Separating Type : Cassette - Friction Pad Type

6)Manual : None

7)Driver Type : Driving by Gearing from Main Motor

8)Pick_up Roller Driver : Solenoid

9)Paper detecting Sensor : Photo Sensor

10)Paper Size Sensor : None

11)Paper Exit Type : Face Down

3.1.2 Transfer Ass’y

The transfer roller delivers the toner of the OPC drum to the paper.

- The life span : Print over 50,000 sheets (in 16 ~30)

3.1.3Driver Ass’y

It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the fusing unit, and the distributing unit.(Motor drive IC : A3977)

- It is a power delivery unit by gearing : Feeder/Developer Motor Fuser/Exit

3.1.4FUSER

The fuser is consisted of the Heat Lamp,Heat Roller,Pressure Roller,Thermister and Thermostat. It adheres the toner on the paper with pressure and heat to complete the printing job.

- Life Cycle : 50K(pages)

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System Overview

1) Heat Lamp

. Heat Lamp Terminal Shape : Terminal Single Type

. Voltage 120 V : 115 + /- 5 %

220 V : 230 + /- 5 %

. Capacity : 750 Watt + /- 30 W

. Life : 3000 Hr

2) Thermostat

. Thermostat Type : Non-Contact type THERMOSTAT

. Control Temperature : 150 5

3) Thermistor

. Thermistor Type : FS-50004 (SEMITEC 364Fs Type)

. Temperature Resistance : 7 (180)

. SYSTEM Temperature SETTING

-Stand by : 160 + /- 5

-Printing : 180 + /- 5 (before 30pages) 75 + /- 5 (after 30pages)

-Overshoot : 200 or less

-Overheat : 210 or less

4)Heat roller

. Length : 254 mm

. Valid length : 222 mm

. GND Type : H/R Bearing Grounding type By SECC Fuser frame

5)Pressure roller

. Shaft

-Length : 239.5 mm

. Rubber

-Length : 222 mm

6)Paper separation method

Teflon Coating with mold Claw System

7)Safety Relevant Facts

. Protecting device when overheating

-1st protecting device : H/W cuts off when detecting an overheating

-2st protecting device : S/W cuts off when detecting overheating

-3st protecting device : Thermostat cuts off the power

. Safety device

-The power of Fuser is cut-off after front cover is open.

-The overheating safety device for customer

-The surface temperature of the Fuser Cover is under 80

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System Overview

3.1.5 LSU (Laser Scanner Unit)

The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of LBP.

The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the /HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for scanning..

OPC Drum

Photo Diode

Polygon Mirror

Polygon Motor

LD Driver circit

Motor Driver

LD(Laser Diode)

Protector panel

Samsung Electronics	Service Manual	3-5

System Overview

3.1.6 Toner Cartridge

By using the electronic photo process, it creates a visual image. In the toner cartridge, the OPC unit and the developer unit are in a body. The OPC unit has OPC drum and charging roller, and the developer unit has toner, toner cartridge, supply roller, developing roller, and blade (Doctor blade)

-Developing Method: Non magnetic 1 element contacting method

-Toner: Non magnetic 1 element shatter type toner

-The life span of toner: 3,000 sheets (ISO 19752 Pattern/A4 standard)

-Toner Cartridge : Initial(1,000), Sales(2,000)

-Toner remaining amount detecting sensor: None

-OPC Cleaning: Collect the toner by using electric static + FILM OPC

-Management of disusable toner: Collect the toner by using electric static (Clenerless TypeNo disusable toner)

-OPC Drum protecting Shutter: None

-Classifying device for toner cartridge: ID is classified by interruption of the frame channel.

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System Overview

3.2 H/W Structure and Descriptions

3.2.1 H/W Overview

ML-2510/2570/2571N is roughly made up Main Control part and SMPS/HVPS part.

Main Controller uses Jupiter4E for ML-2510 and SPGP V3 for ML-2570/2571N, which is on chip micro controller and developed for Low-end Laser Beam Printer.

Jupter4E and SPGP V3 provide provides the integrated printing functions such as Printer video controller, Laser Scan Unit controller, PWM controller and Bi-polar Stepper Motor Controller and has USB and IEEE 1284 Parallel Interface capacity.

SMPS

OPE B’D

(Build-in HVPS)

HVPS

Main Controller

Jupiter IV ASIC for 2510		V1.1	USB for 2510
SPGP V3 for 2570/2571N		V2.0	USB for 2570/2571N

DRAM 8M Byte for 2510

32MByte for 2570/2571N

Printer Engine B’D

Flash Memory for 2510 8MByte for 2570/2571N

LSU

Motor

3.2.1.1.Main Control

ML-2510/2570/2571N of Main Control are composed of CPU and Print and operate follows function by CPU

-Bus Control, I/o

-Handling, each Driver and PC Interface

Main Control operate its full function on the Main B'd and CPU control Controller ASIC.

3.2.1.2 CPU

ML-2510 Use 32Bit RISC Processor of Jupiter4e, which is built in Memory, while ML-2570/2571N sue SPGP V3, They control system by operating operation block of the system.

Samsung Electronics	Service Manual	3-7

System Overview

- Main Function Block: Completely Integrated System for Embedded Applications,

32 Bit Risc Architecture for ML-2510 and ARM10 CPU for ML-2570/2571N ARM9 CPU

LSU Interface Module for Interfacing PVC with LSU

2 Channel General Purpose DMA Controller for High Speed I/O Dual Memory Bus Architecture

-Operation Frequency : 150MHz for ML-2510/400MHz for ML-2570/2571N

-Operation Voltage : 3.3V

-POWER ON RESET TIME : 6.6ms below

3.2.1.3Flash Memory

Store System Program and can be down load System Program through PC Interface

-Capacity : 8M Byte for ML-2570/2571N, ML-2510 uses 0.5M Byte ASIC built flash memory

-Access Time : 70 nsec

3.2.1.4DRAM

When Printing, use Band Buffer, System Working Memory Area .

-8M capa : 8M Byte basic for ML-2510

8M :Printing System Working Memory Area

-32M capa : 32M Byte basic for ML-2570/2571N 32M :Printing System Working Memory Area

-Access Time : 60 nsec

3.2.1.5ENGINE

This recording method is electrophography method using LSU, which toner is composed of 1 component and non magnetic.

1)Recording Method : LSU(Laser Scanning Unit)

2)Printing Speed :24ppm

(In continuing printing base A4, printing pages from 2nd to last during 1min)

3)Recording Density : 1200 x 600dpi

4)Cassette Capa. : Cassette : 250sheets(75g Base),

Manual : N/A((DRIVE Selection : Paper, OHP, Envelop - 1 sheet)

5)Paper Size : Cassette ,Manual; Width = 76 ~ 216mm, Length = 125mm ~ 356mm

6)Effective recording size

-A4 : 202 x 291 mm

-Letter : 208 x 273 mm

-Legal : 208 x 350 mm

-Folio : 208 x 325 mm

-Top Margin : 4.23 ° 3 mm

-Left, Right Margin : 4.23 ° 3 mm

7)CRU(Toner Cartridge)Life : 3,000pages Printing(A4, 5% Pattern Printing)

8)First Print Out Time : within 9sec( Standby )

9)Warming up time : within 15sec (Ambient : 25° )

3-8 Service Manual

Samsung Electronics

System Overview

3.2.2 Main Board

Main Board are composed of Engine and Controller on the one-Board.

Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the current driving and also include Paper Exit Sensor, Cover Open s/w, panel s/w.

< ML-2510 >

< ML-2570/2571N >

Samsung Electronics	Service Manual	3-9

System Overview

U6(Jupiter 4E for ML-2510 and SPGP V3 for ML-2570/2571N)

-ML-2510 use Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 80MHz.

-It use 3.3V for operation voltage and I/O, It uses 80MHz for system bus CLK, Built in Flash Memory.

-ML-2570/2571N use SPGP V3 which has a CPU core CLK with over 400MHz and a System bus 100MHz.

SDRAM

- Main memory. SDCLK is 75Mhz for ML-2510, SDCLIC is 100Mhz for ML-2570/2571N.

A3977

- It is an Main motor driver IC and controls the motion of main motor.

Regulator

- It Supplies the core voltage to CPU by converting 3.3V to 1.8V for ML-2510

EEPROM(U8 : 93C66 for ML-2510, 24C32 for ML-2570/2571N. - It is an EEPROM with 12C method.

SMPS connector(CN8)

-It connects SMPS, supplies the power, and delivers the high voltage contol signal, etc. If a harness is not normally connected to this connector, power cannot be supplied.

LSU connector(CN12) - It connects a LSU.

DC Motor connector(CN11)

- It connects an main motor and drive a DC motor.

HVPS connector(CN10) - It connects a HVPS.

DCU connector(CN1)

- It interface a DCU-JIG

USB connector(CN6)

- It interface the computer.

Network Connector(ML-2571N only) - It interface the network

IEEE 1284 Parallel Connector

- It interface the computer.

DC To DC Converter

-It supplies the core sltage to CPU

by Converting 3.3V to 1.3V for ML-2570/2571N

3-10 Service Manual

Samsung Electronics

System Overview

3.2.3 Asic(Jupiter 4E) Specification

3.2.3.1 Introduction

Jupiter4E is One-Chip micro-Controller for Low cust Laser beam Printer.

1.One Chip Laser Beam Printer Controller

-GDI only

-AMBA AHB used for high speed bus transactions between masters and slaves

-AMBA APB used for low speed bus transactions between ARM core and peripherals

-3 PLLs ( 2 Dithered PLL and 1 General PLL)

first for CPU(150MHz), AHB(75MHz), APB(75MHz), second for USB(48MHz)

third for PVC(59MHz)

-75MHz system operation

-1.8V power operation

-3.3V tolerant input and bi-directional I/Os

-SDRAM and IO Address / Data signals multiplexing

2.Integrated ARM940T 32-bit RISC embedded processor core

-75MHz core frequency operation

-Harvard Architecture Cache : 4KByte Instruction cache, 4KByte Data cache

-Single memory bus architecture

3.Built in Flash Memory

-4MBits (128Kx32bits)

-Serial programming mode using flash programmer tool

-Internally flash memory read / write operation support

-Programmable access timing control

4.32MB Special function Register Area

5.Directly connected to 3 external IO banks (IOC)

-32 MB size in each IO bank

-Programmable setup, access, hold timing

-Programmable recovery time for slow devices

-Allows to access peripheral devices such as GPIO control logic

6.Directly connected to 1 external ROM bank (ROMC)

-32 MB size for one ROM bank

-One external flash memory attachable.

7.Directly connected to two SDRAM banks (SDRAMC)

-Extensible architecture

-Two external SDRAM attachable.

-SDRAM controller supports PC-100 and PC-133 SDRAM running at 75MHz

-Up to 32MB per bank.

-Support for SDRAM configurations including programmable column address

-Programmable refresh interval

8.Interrupt Controller (INTC)

-FIQ or IRQ mode operation selectable

-Programmable Interrupt Enable/Disable

	Service Manual	3	-11
	Samsung Electronics

System Overview

9.USB interface

-Version 1.1

-Four 128x8 FIFOs for Data transmission.

-Interrupt based input / output interface, no DMA based interface support

-USB wrapper for AHB interface

-AHB Bus interface

10.Serial port interface (UART)

-Programmable Baud Rate

-2 channel Independent Full Duplex UART

-Polling, Interrupt based operation support

-Max 16 byte FIFO to handle SIR Bit Rate Speed

11.Printer video controller for LBP engines (PVC)

-20MHz video rate (Hummingbird 2 : letter - 21 ppm, A4 : 20ppm)

-video data transmitted through LSU Controller

12.Laser Scan Unit (LSU) Controller

-Laser Scan Unit (LSU) Interface for Laser Diode turn on/off timing control

-Sample & hold period generation.

-Auto Power Control for Laser Diode with PID control method using internal 10 bits DAC.

-LSU clock generation

-Brushless DC motor control clock generation

13.ADC Interface

-4 channels ADC interface for analog devices such as temperature sensor.

-Programmable ADC Clock Cycle.

-Automatic or Manual AD Conversion support.

-4 Special Function Registers for monitoring the ADC results for 4 channels.

14.PWM Controller

-4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION

15.Bi-polar Stepper Motor controller (MOTORC)

-Phase generation for the purpose of paper feeding

-fixed hardware phase and current table

-programmable phase and interval time

-Interrupt based phase change operation

16.Timer

-3 Independent Programmable Timers

-Watch Dog Timer for S/W Trap

17.Miscellaneous

-Mux controlled 24 GPI, 28 GPO & 5 GPIO ports .

-Mutual exclusive GPO/GPIO ports control by the port control enable register

-Programmable Bus Master Priority.

-Project code added.

3-12 Service Manual

Samsung Electronics

System Overview

3.2.3.2 Jupiter4E Internal Block Diagram

TMS

TCK

TDI

TDO

nTRST

PPD[7:0]

nSTROBE,

nINIT,

nSLCTIN, nAUTOFD

PDE,

BUSY,

nACK,

SELECT,

PERROR, nFAULT

RXD1-0

TXD1-0

D+

D-

Dpullup

VBUS

GPIO4-0

GPO27-0

TEST

OM2-0

nRESET

XI

XO

CAP2-0

SCLK

EXTCLK

ARM CORE

( ARM940T

I / C 4 KB

D/ C 4 KB )

TIC

PVC

PPI

UART

USB CORE

( USB1.1 )

INTC

TCU

MISC

PLL

( pll 2096x, pll 2073x)

CLOCK & RESET

AHBC

( ARB, DEC, MUX)

A

H

B

A

H

B

A

PAPB

BBRI DGE

SCL

SDA

FLASH CORE

PROGRAM

( mfl130_128Kx32 )

ENEXHV

EXHV

DC2-0

			nSRAS
			nSCAS
	SDRAMC		nSCS
	( EXT	: 2 CH)	DQM1-0
			BA1-0
			SCKE
	ADDR/DATA		ADDR18-0
			DATA15-0
	BUS	MUX
			nSWE/nWE
			nIOCS1-0
	IOC	( 3 CH)	nIOCS2_WE
			nIOCS2_OE

/ ROMC (1 CH)	nIOCS_ALL
	nROMCS
	nOE

nLREADY nHSYNC VDO

LSUC LSUCLK ( dac1264x_1455) SHPERIOD

nLDON DACOUT BLDC_CLK

ADC INTERFACE	ADCIN3-0
( adc1275x_pc)
PWM	PWM3-0
MOTORC	MOTPAT5-0

	Service Manual	3	-13
	Samsung Electronics

System Overview

3.2.3.3 Asic(SPGPv3)

CPU Core : ARM1020E

- 32KB instruction cache and 32KB data cache

Operating Frequency

-CPU Core : over 300MHz

-System Bus : 100MHz

SDRAMC

-32Bits Only, 100MHz

-5 Banks (Up to 128MB per Bank)

ROMC

- 4 Banks (Up to 16MB per Bank) IOC

- 6 Banks (Up to 16MB per Bank DMAC

- 4 Channels HPVC

-Dual/Single Beam

-LVDS Pad(VDO, HSYNC)

UART

- 5 Channels (1 Channels Supports DMA Operation)

PCI Controller

-32Bits, 33/66MHz

-PCI Local Bus Specification rev2.2 Complaint

-Host / Agent Mode (Support 4 Devices in Host Mode)

NAND Flash Controller

-8/16Bits, H/W EEC Generation

-Auto Boot Mode (Using Internal SRAM, 4KB)

MAC

-10M/100Mbps

-Full IEEE 802.3 Compatibility

Engine Controller

-LSU Interface Unit

-Step Motor : 2 Channels

-PWM : 8 Channels

-ADC : 6 Channels

I2C Controller

- I2C(S-BUS) Slave Device Support(I2C Version 2.1)

RTC

- RTC Core Voltage : 3V

PLL

- 3 PLL : MAIN, PCI, PVC

3.2.3.4 Memory

Flash Memory : It stores System Program and downloads the System Program through PC Interface, and in case of model for export it compresses the PCL font, then stores it.

-Capacity : 8M Byte (Nor Flash)

-Random Access Time : 10 us (Max)

-Serial Page Access Time : 50ns (Min)

DRAM : It is used as Swath Buffer, System Working Memory Area, etc. when printing.

It stores Font List, compressed into Flash memory, on DRAM and uses it as PCL font in case of model for export.

-Capacity : 32M Byte(STD/MAX)

-Type : SDRAM 100MHz/133MHz, 16bit

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System Overview

3.2.3.5 SPGPv3 Internal Block Diagram

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System Overview

3.2.3.6 Flash Memory

It stores the system program and downloads system program through the PC Interface.

Capacity : 8M Byte (NOR Flash)

Random Access Time : 10 us (Max) Serial Page Access Time : 50ns (Min)

3.2.3.7 SDRAM

It is used as swath buffer, system working memory area, etc. while Printing.

Capacity : The 32M Byte is for this model (32M :Printing System Working Memory Area )

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Samsung Electronics